Chinese Journal of Lasers, Volume. 45, Issue 9, 911015(2018)
A Temperature Measuring Lidar Double Gratings Spectrometer with High Linear Dispersion
Figures & Tables(8)
Fig. 1. Pure rotational Raman backscattering lines of N2 at 355 nm when excitation temperature is 200 K or 300 K
Fig. 2. Structure diagram of temperature measuring pure rotational Raman laser lidar double gratings spectrophotometer
Fig. 3. Relationship between height of optical fiber image and incident angle of gratings
Fig. 4. Imaging deviations in center and edge of pure rotational Raman spectral lines. (a) Center of spectral line; (b) edge of spectral line
Fig. 5. Spot diagrams at different spectral lines. (a) Single temperature measuring pure rotational Raman line; (b) 3 adjacent temperature pure rotational Raman spectral lines; (c) 24 pure rotational Raman spectral lines
Fig. 7. Comparison of measured data and backscattering intensity of N2 for temperature measuring lidar.(a) Temperature measuring pure rotational Raman echo signal; (b) comparison between measured data and theoretical calculation of N2
Table 1. Design parameter table of double gratings spectrometer
View tableTable 1. Design parameter table of double gratings spectrometer
Parameter Values Spectral region /nm 353.8-356.5 Spectrum interval /nm 0.1 Gratings line density /(line·mm-1) 3600 Object height /mm 0.4 Imaging width /mm ≤0.8 Adjacent spectral line imaging interval /mm 1 Grating diffraction angle /(°) 50 Line dispersion /(nm·mm-1) 0.1
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Liu Yang, Zhang Tianshu, Zhao Xuesong, Zhong Liujun, Fu Yibin, Chen Zhenyi, Dong Yunsheng, Fan Guangqiang. A Temperature Measuring Lidar Double Gratings Spectrometer with High Linear Dispersion[J]. Chinese Journal of Lasers, 2018, 45(9): 911015
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Received: Mar. 15, 2018
Accepted: --
Published Online: Sep. 8, 2018
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